package com.heima.userbehavior.interceptor;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @创建人: stone
 * @描述: 拦截器,实现从请求头中将用户数据放到线程变量中
 */
@Slf4j
public class AppUserInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //获取请求头,拿到数据
        String userId = request.getHeader("userId");
        //存储到线程变量空间
        AppUserIdHolder.set(userId);
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

//    @Override
//    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
//        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
//    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        AppUserIdHolder.remove();

        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
